int16 EMPTY_TYPE  = 0            # 
int16 FACE_TYPE   = 1            # 
int16 BALL_TYPE   = 2            # 
int16 type                       # object type
int16 width                      # image max width
int16 height                     # image max height
int16 number                     # object number
int32[] x                        # position : x
int32[] y                        # position : y